Scientists have discovered that icy-surfaced Enceladus, a small moon of Saturn, appears to have a regional ocean of subsurface liquid water at its south pole (Science 2014, DOI: 10.1126/science.1250551). Enceladus may be joining a growing list of solar system bodies—Mars, Jupiter’s moon Europa, and Saturn’s moon Titan—that have or have had liquid water and are or were potentially hospitable for life. Luciano Iess of Italy’s Sapienza University of Rome . . .